Plat Cable Belden

7

Please refer to “Terms of Use of Master Catalog” on page 22.22

Table of ContentsFlat Cable Page No.

Introduction 7.2Gray Ribbon 7.3–7.6

9L300XX Series: .025″ Pitch, 30 AWG, PVC 7.32L280XX Series: 1mm Pitch, 28 AWG, PVC 7.49L280XX Series: .050″ Pitch, 28 AWG, PVC 7.59L260XX Series: .050″ Pitch, 26 AWG, PVC 7.6

Rainbow 7.7–7.89R280XX Series: .050″ Pitch, 28 AWG, Color-coded PVC 7.78R280XX Series: .050″ Pitch, 28 AWG, Color-coded FEP 7.8

Vari-Twist® 7.9–7.109V280XX Series: .050″ Pitch, 28 AWG, PVC 7.98V280XX Series: .050″ Pitch, 28 AWG, FEP 7.10

Shielded Jacketed 7.119L283XX Series: .050″ Pitch, 28 AWG, PVC 7.11

Shielded Jacketed Vari-Twist 7.129V283XX Series: .050″ Pitch, 28 AWG, PVC 7.12

Technical Information 7.13–7.14

Flat

Cab

le

7.1

IntroductionSubhead

Belden® flat cables are designed using the same expertise anddesign sophistication that made Belden a leader in round cable.Whatever your application, Belden is committed to offering quality flat cable products at a competitive price. Our extensive line includes Gray Ribbon, Rainbow, Vari-Twist® and Shielded and Jacketed Flat Cable options. Many of these are available off the shelf from local distributors. If you have a new or unusualapplication or you cannot find a flat cable in this catalog section that meets your technical requirements, contact Technical Support at 1-800-BELDEN-1.

Benefits of Flat Cable

Mass Termination Terminating flat cable is done with theentire group of conductors as a unit, which is more efficient than working with individual conductors at one time.

Reliability The simplicity of flat cable with its parallel conductor geometry eliminates many of the common sources of wiring error and malfunction. Registration of the conductors is one-to-one with the terminating connector or board so that proper contact assignment is almost automatic.

Space and Weight Reduction The use of flat cable ofteneliminates much of the conventional wire weight and bulk. Suchthings as redundant insulating materials, fillers and tapes are not required. In addition, the composite flat cable construction is so mechanically strong that it is not necessary to have largeconductors for strength. The copper cross-section can thus bereduced to what’s required to carry the current load or to satisfyvoltage drop requirements.

Flexibility Flat cable is extremely flexible when bent in theplane of its thin cross-section. This flexibility has been utilized in applications where continuous or high flexing is necessary,e.g. drawers, doors, rotating arms, etc.

Greater Strength Strength is enhanced by the fact that all conductors and insulation equally share tensile loads.

Consistent Electrical Characteristics Because the conductor spacing is fixed and the geometry of the cable is constant, the electrical characteristics, such as impedance,capacitance, inductance, time delay, crosstalk and attenuation, are consistent.

Greater Current Carrying Capacity Flat cables have greater surface-to-volume ratio than their round cable counterparts, consequently having higher efficiency in dissipating heat. This allows a higher current level for agiven temperature rise and conductor cross-section.

Reduced Skewing Effects Due to the conductors havingthe exact physical and electrical length, along with a continuousand consistent dielectric, time delays between signals within agiven flat cable are minimized.

High-Density Interconnections The cabling densityachievable using flat cable is superior to that using conventionalcable because of the high wire-to-cable cross-sectional density.Layers of flat cable are more effectively packed for higher conductor density than round cable.

Ease of Handling Flat cable folds and bends readily, conforms to the mounting area, fastens easily with clamps,adhesive, or double-faced tape, and eliminates the installation and lacing difficulties associated with round wire cabling. Visible conductors in a fixed position within the dielectric simplify coding, inspection and circuit tracing.

Flat Cable Packaging

Packaging of flat cable is offered in one or more of the followingconfigurations, as noted in the Physical Specifications table for each product:

100: 100′ put-up in a cardboard container. May contain more than one piece.

H100: A one-piece 100′ length, in a cardboard container.

H300: 300′ length in a cardboard container may contain more than one piece.

R300: 300′ length put-up on a reel may contain more than one piece. It is designed for use by assemblers who use automated terminating equipment. An additional feature is the 9″ inner tail exposed through the flange. This enables users to terminate the cable end to a device, which is necessary for in-line testing.

F L A T C A B L E 7.2

Note: Material on this page obtained from and printed with the permission of the Institute for Interconnecting and Packaging Electronic Circuits (IPC).

F o r m o r e i n f o r m a t i o n , c o n t a c t B e l d e n Te c h n i c a l S u p p o r t : 1 - 8 0 0 - B E L D E N - 1 • w w w . b e l d e n . c o m

Gray Ribbon 9L300XX Series.025″ Pitch, 30 AWG, PVC

9L30026 26 .650 ±.010 16.51 ±.25 .625 ±.007 15.88 ±.189L30050† 50 1.250 ±.011 31.75 ±.28 1.225 ±.009 31.12 ±.23†Available in H100 packaging only.

Dimensions

Product Description

Belden’s miniaturized .025″ pitch extruded gray ribbon cable provideshigher signal density, greater design flexibility, and an alternative tothe expensive Teflon® transmission cables. The cable is manufacturedto precise tolerances which allows for mass-termination to standard.050″ contact IDC connectors while assuring consistent and reliableelectrical characteristics. With the miniaturization of the interconnects,significant reduction in components can be achieved. The cable isconstructed of stranded 30 AWG (7x38) tinned copper conductors.Insulation material consists of Gray PVC, with a Red polarity stripe forproper circuit alignment. Standard conductor counts are 26 and 50;other sizes are available upon request. The cable is UL approvedand CSA certified, and passes the VW-1 Vertical Wire Flame Test.

Color Code: Gray with Red polarity stripe.

Application: Internal interconnection or internal wiring of electronic equipment.

Physical Specifications

Conductor 30 AWG (7x38) Tinned Copper

Insulation .0075″ Nom. Wall Gray PVC

Pitch .025″ ± .002″

Temperature Rating -40 to +105°C

Flammability Rating UL: VW-1, CSA: FT1

UL Approval File #E12683, Style 2678

CSA Approval File #LL7874, CSA AWM I A105°C 150V FT1

Packaging H100, H300

Electrical Specifications

Voltage Rating 150V RMS

Current Rating .5A

Conductor Resistance 108Ω/1000 ft.

Insulation Resistance >1 x 1010Ω • 10 ft. (3m)

Impedance* 70Ω

Capacitance* (@ 1 MHz) 24 pF/ft. (79 pF/m)

Inductance* (@ 1 MHz) .14 µH/ft. (.46 µH/m)

Propagation Delay* 1.52 ns/ft. (4.99 ns/m)*Test Configuration: G-S-G (ground-signal-ground).

Unbalanced Crosstalk Attenuation8

7

6

5

4

3

2

1

03 5 7

Pulse Rise Time (ns)

Cros

stal

k (%

)

Near end

Far end

9L300XX Series

Cable Length: 10 ft.

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

20 30 40 50 60 70 80 90 10010

100

10

5

1

50

9L300XX Series

.025″ ±.002″

A

B.013″ ±.005″

.027″ ±.002″

.0075″ Nom. Gray PVC

30 AWG (7 X 38)Tin-Plated Copper

Red Polarity StripeOn #1 Conductor


PartNo.

No. of

Cond.Inch mm

Dimensions

Width “A” Span “B”

Inch mm

7•

Flat

Cab

le


Teflon is a DuPont trademark.

Gray Ribbon 2L280XX Series1mm Pitch, 28 AWG, PVC


2L28026** 26 1.020 ±.008 25.9 ±.20 .984 ±.008 25.0 ±.202L28034** 34 1.335 ±.012 33.9 ±.30 1.299 ±.012 33.0 ±.302L28040** 40 1.571 ±.012 39.9 ±.30 1.535 ±.012 39.0 ±.302L28044** 44 1.728 ±.012 43.9 ±.30 1.693 ±.012 43.0 ±.302L28050 50 1.965 ±.012 49.9 ±.30 1.929 ±.012 49.0 ±.30**Available in H100 packaging only.

Dimensions

Product Description

Belden’s 1mm (.03937″ pitch) extruded gray ribbon cable wasdesigned for the disk drive market where the 2mm IDC connector is widely used. The cable provides improved space reduction, easybreakouts for circuit routing, and maintains the current carryingcapacity required for these applications. In addition, the electricalperformance meets those requirements specified by the SCSI-3parallel interface document. The cable is constructed of stranded 28 AWG (7x36) tinned copper conductors. Insulation material consists of Gray PVC, with a Black polarity stripe for proper circuitalignment. Standard conductor counts are 26, 34, 40, 44 and 50;other sizes are available upon request. The cable is UL approvedand CSA certified, and passes the VW-1 Vertical Wire Flame Test.

Color Code: Gray with Black polarity stripe.





Pitch 1mm ± 0.51mm (.0394″ ± .002″)


Flammability Rating UL: VW-1; CSA: FT1



Packaging H100, R300



Current Rating 1A

Conductor Resistance 68.2Ω/1000 ft.


Impedance* 90Ω

Capacitance* (@ 1 MHz) 16.5 pF/ft. (54 pF/m)



Unbalanced Crosstalk* Attenuation*

Cros

stal

k (%

)

8

7

6

5

4

3

2

1

03 5 7

Pulse Rise Time (ns)Cable Length: 10 ft.

Far End

Near End

2L280XX Series

25

20

15

1098765

4

3

210 20 30 40 50 60 70 80 90 100

Atte

nuat

ion

(dB/

100

ft.)

Frequency (MHz)

2L280XX Series

1.0 ±0.051mm (.0394″ ±.0020″)

A

B

.450mm (.0177″) Nom.

0.9 ±0.08mm(.0354″ ±.0031″)

0.254mm (.010″) Nom. Gray PVC


Black Polarity StripeOn #1 Conductor

PartNo.

No. of

Cond.Inch mm

Dimensions


Inch mm


9L28009 9 .45 ±.008 11.43 ±.20 .40 ±.008 10.16 ±.209L28010 10 .50 ±.008 12.70 ±.20 .45 ±.008 11.43 ±.209L28014† 14 .70 ±.008 17.78 ±.20 .65 ±.008 16.51 ±.209L28015** 15 .75 ±.008 19.05 ±.20 .70 ±.008 17.78 ±.209L28016 16 .80 ±.008 20.32 ±.20 .75 ±.008 19.05 ±.209L28020 20 1.00 ±.008 25.40 ±.20 .95 ±.008 24.13 ±.209L28024† 24 1.20 ±.008 30.48 ±.20 1.15 ±.008 29.21 ±.209L28025 25 1.25 ±.008 31.75 ±.20 1.20 ±.008 30.48 ±.209L28026 26 1.30 ±.008 33.02 ±.20 1.25 ±.008 31.75 ±.209L28034 34 1.70 ±.008 43.18 ±.20 1.65 ±.008 41.91 ±.209L28036** 36 1.80 ±.012 45.72 ±.30 1.75 ±.012 44.45 ±.309L28037** 37 1.85 ±.012 46.99 ±.30 1.80 ±.012 45.72 ±.309L28040 40 2.00 ±.012 50.80 ±.30 1.95 ±.012 49.53 ±.309L28050 50 2.50 ±.012 63.50 ±.30 2.45 ±0.12 62.23 ±.309L28060 60 3.00 ±.012 76.20 ±.30 2.95 ±.012 74.93 ±.309L28064 64 3.20 ±.012 81.28 ±.30 3.15 ±.012 80.01 ±.30**Available in H100 packaging only.

† Not available in R300 packaging.

Dimensions

Product Description

Belden’s (9L280XX Series) .050″ pitch extruded gray ribbon cablewas designed for general purpose electronic interconnect applications.The cable provides reliable mass-termination to standard .100″contact IDC connectors, flexibility, consistent electricals and break-outs can be made easily with the tear feature design. The cable isconstructed of stranded 28 AWG (7x36) tinned copper conductors.Insulation material consists of Gray PVC, with a Red polarity stripefor proper circuit alignment. Various conductor counts are standard;other sizes are available upon request. The cable is UL approvedand CSA certified, and passes the VW-1 Vertical Wire Flame Test.

Color Code: Gray with Red polarity stripe (standard).





Pitch .050″ ± .002″





Packaging H100, H300, R300



Current Rating 1A



Impedance* 105Ω




Unbalanced Crosstalk* Attenuation*8

7

6

5

4

3

2

1

03 5 7


Cros

stal

k (%

)

Near end

Far end

9L280XX Series

Frequency (MHz)10 20 30 40 50 60 70 80 90 100

9L280XX Series

25

20

15

1098765

4

3

2

Atte

nuat

ion

(dB/

100

ft.)

.050″ ±.002″

A

B.025″ ±.007″

.035″ ±.003″



Red Polarity StripeOn #1 Conductor

.010″ Nom.



7•

Flat

Cab

le


Part No.Standard

[UL & CSA]

No. of

Cond.Inch mm

Dimensions


Inch mm


9L26010 10 .50 ±.008 12.70 ±.20 .45 ±.008 11.43 ±.209L26014†† 14 .70 ±.008 17.78 ±.20 .65 ±.008 16.51 ±.209L26016** 16 .80 ±.008 20.32 ±.20 .75 ±.008 19.05 ±.209L26020†† 20 1.0 ±.008 25.40 ±.20 .95 ±.008 24.13 ±.209L26025** 25 1.25 ±.008 31.75 ±.20 1.20 ±.008 30.48 ±.209L26026†† 26 1.30 ±.008 33.02 ±.20 1.25 ±.008 31.75 ±.209L26034** 34 1.70 ±.008 43.18 ±.20 1.65 ±.008 41.91 ±.209L26040† 40 2.00 ±.012 50.80 ±.30 1.95 ±.012 49.53 ±.309L26068** 68 3.40 ±.012 86.36 ±.30 3.35 ±.012 85.09 ±.30**Available in H100 packaging only.

† Not available in H300 packaging.†† Not available in R300 packaging.

Dimensions

Product Description

Belden’s (9L260XX series) .050″ pitch extruded gray ribbon cablewas designed for general purpose electronic interconnect applicationswhere higher current carrying capacities are required. The designalso conforms to the electrical performance specifications outlined bythe SCSI-3 parallel interface document. As with the 9L280XX series,the cable provides reliable mass-termination to standard .100″contact IDC connectors, flexibility, consistent electricals and breakoutscan be made easily with the tear feature design. In addition, theoverall cable thickness is only .038″ ± .002″ allowing mateability withall standard IDC connectors. The cable is constructed of stranded26 AWG (7x34) tinned copper conductors. Insulation material consistsof Gray PVC, with a Blue polarity stripe for proper circuit alignment.Various conductor counts are standard; other sizes are availableupon request. The cable is UL approved and CSA certified, andpasses the VW-1 Vertical Wire Flame Test.

Color Code: Gray with Blue polarity stripe (standard).





Pitch .050″ ± .002″





Packaging H100, H300, R300



Current Rating 1.5A

Conductor Resistance 43Ω/1000 ft.


Impedance* 90Ω

Capacitance* (@ 1 MHz) 18 pF/ft. (59.06 pF/m)



8

7

6

5

4

3

2

1

03 5 7


Cros

stal

k (%

)

Near end

Far end

9L260XX Series

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

10 20 30 40 10050 60 70 80 90

9L260XX Series2

3

4

5

6789

10

15

20

25

.050″ ±.002″

A

B.025″ ±.007″

.038″ ±.002″



Blue Polarity StripeOn #1 Conductor

.010″ Nom.




Part No.Standard

[UL & CSA]

No. of

Cond.Inch mm

Dimensions


Inch mm

Rainbow 9R280XX Series.050″ Pitch, 28 AWG, Color-coded PVC

9R28010 10 .50 12.70 .45 ±.007 11.43 ±.189R28014 14 .70 17.78 .65 ±.007 16.51 ±.189R28016 16 .80 20.32 .75 ±.011 19.05 ±.289R28020 20 1.00 25.40 .95 ±.011 24.13 ±.289R28024 24 1.20 30.48 1.15 ±.011 29.21 ±.289R28025 25 1.25 31.75 1.20 ±.011 30.48 ±.289R28026 26 1.30 33.02 1.25 ±.011 31.75 ±.289R28034 34 1.70 43.18 1.65 ±.011 41.91 ±.289R28037 37 1.85 46.99 1.80 ±.015 45.72 ±.389R28040 40 2.00 50.80 1.95 ±.015 49.53 ±.389R28050 50 2.50 63.50 2.45 ±.015 62.23 ±.389R28060 60 3.00 76.20 2.95 ±.015 74.93 ±.389R28064 64 3.20 81.28 3.15 ±.020 80.01 ±.51

Dimensions

Product Description

Belden’s .050″ pitch, color-coded PVC flat cable allows for quickidentification and circuit tracing, along with easy breakouts for circuitrouting. Designed for mass-termination with standard IDC connectors,the cable is constructed of stranded 28 AWG (7x36) tinned copperconductors, color-coded PVC pre-insulated singles — laminated to a single clear PVC substrate. Fourteen various conductor countsare standard; other sizes are available upon request. The cable is UL approved (CSA available upon request) and passes the VW-1Vertical Wire Flame Test.

Color Code: Brown, Red, Orange, Yellow, Green, Blue, Purple,Gray, White, Black. Sequence is repeated as necessary.

Application: Internal interconnection or internal wiring of electrical equipment.



Insulation .010″ Nom. Wall Color-coded PVC

Substrate .010″ Nom. Wall Clear PVC

Pitch .050″ ± .005″


Flammability Rating UL: VW-1


CSA Approval Available upon request

Packaging 100



Current Rating 1A



Impedance* 105Ω





Pulse Rise Time (ns)3 5 7

8

6

4

2

0

Cros

stal

k (%

)

9R280XX Series

Near End

Far End

Frequency (MHz)10 20 30 40 50 60 70 80 90100

25

20

15

109876

5

4

3

2

Atte

nuat

ion

(dB/

100

ft.)

9R280XX Series

.050″ ±.005″

A

.010″ Nom. Color Coded PVC

B

.042″ ±.003″


.010″ Clear PVC Substrate


PartNo.

No. of

Cond.Inch mm

Dimensions


Inch mm

7•

Flat

Cab

le


Rainbow 8R280XX Series.050″ Pitch, 28 AWG, Color-coded FEP (High Temperature)


PartNo.

No. of

Cond.Inch mm

Dimensions


Inch mm

8R28010 10 .50 12.70 .45 ±.007 11.43 ±.188R28014 14 .70 17.78 .65 ±.007 16.51 ±.188R28016 16 .80 20.32 .75 ±.011 19.05 ±.288R28020 20 1.00 25.40 .95 ±.011 24.13 ±.288R28025 25 1.25 31.75 1.20 ±.011 30.48 ±.288R28026 26 1.30 33.02 1.25 ±.011 31.75 ±.288R28034 34 1.70 43.18 1.65 ±.011 41.91 ±.288R28037 37 1.85 46.99 1.80 ±.015 45.72 ±.388R28040 40 2.00 50.80 1.95 ±.015 49.53 ±.388R28050 50 2.50 63.50 2.45 ±.015 62.23 ±.388R28060 60 3.00 76.20 2.95 ±.015 74.93 ±.388R28064 64 3.20 81.28 3.15 ±.020 80.01 ±.51

Dimensions

Product Description

Belden’s .050″ pitch, color-coded FEP flat cable allows for high andlow temperature, low out-gassing and chemical resistant applications,improved electricals, and provides quick identification and circuittracing, along with easy breakouts for circuit routing. Designed for mass-termination with standard IDC connectors, the cable is constructed of stranded 28 AWG (7x36) silver-plated copperconductors, color-coded FEP pre-insulated singles — laminated to a single clear FEP substrate. Thirteen various conductor counts arestandard; other sizes are available upon request. The cable is ULapproved and passes the IEEE 383-1974, 70,000 BTU Flame Test.

Color Code: Brown, Red, Orange, Yellow, Green, Blue, Purple,Gray, White, Black. Sequence is repeated as necessary.

Application: Internal wiring of appliances or electronic equipment.May be additionally marked “For 300V Peak Electronic Use Only.”


Conductor 28 AWG (7x36) Silver-plated Copper

Insulation .010″ Nom. Wall Color-coded FEP

Substrate .010″ Nom. Wall Clear FEP

Pitch .050″ ± .005″


Flammability Rating UL: VW-1; IEEE: 383-197470,000 BTU


Packaging 100



Current Rating 1A



Impedance* 120Ω

Capacitance* (@ 1 MHz) 10.5 pF/ft. (34.5 pF/m)





0

Near End

Far End

Cable Length: 10 ft.

Cros

stal

k (%

)

2

4

6

8

3 5 7

8R280XX Series

101.5

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

2.0

2.5

3.0

4.0

5.06.07.08.09.0

10.0

15.0

20 30 40 50 60 70 80 90100

8R280XX Series

.050″ ±.005″

A

.010″ Nom. Color Coded FEP

B

.042″ ±.003″

28 AWG (7 X 36)Silver-Plated Copper

.010″ Clear FEP Substrate


Vari-Twist® 9V280XX Series.050″ Pitch, 28 AWG, PVC

9V28010 5 .50 12.70 .45 ±.012 11.43 ±.319V28014 7 .70 17.78 .65 ±.012 16.51 ±.309V28016 8 .80 20.32 .75 ±.012 19.05 ±.309V28020 10 1.00 25.40 .95 ±.015 24.13 ±.389V28026 13 1.30 33.02 1.25 ±.015 31.75 ±.389V28034 17 1.70 43.18 1.65 ±.015 41.91 ±.389V28036 18 1.80 45.72 1.75 ±.017 44.45 ±.439V28040 20 2.00 50.80 1.95 ±.017 49.53 ±.439V28050 25 2.50 63.50 2.45 ±.017 62.23 ±.439V28060 30 3.00 76.20 2.95 ±.020 74.93 ±.519V28064 32 3.20 81.28 3.15 ±.020 80.01 ±.51

Dimensions

Product Description

Belden’s PVC Vari-Twist 9V280XX series was designed to reducecrosstalk in the balanced mode by twisting the pairs, but can be mass-terminated in the programmed flat sections with any standardIDC connector. To further reduce crosstalk, each adjacent pair is twisted in the opposite direction. The standard twist length is 18 inches followed by a 2 inch flat section of .050″ spacedconductors. The cable consists of stranded 28 AWG (7x36) tinnedcopper, color-coded PVC pre-insulated singles — laminated to asingle clear PVC substrate. Eleven various conductor/pair countsare standard; other sizes are available upon request. The cable is UL approved (CSA available upon request) and passes the VW-1 Vertical Wire Flame Test.

Upon your request, Vari-Twist can also be manufactured to yourown specific requirements whether that be longer or shorter twistsections and/or flat sections.

Color Code: Each pair consists of a Tan conductor paired with acolor-coded conductor. Color Sequence Each Terminating Section:Brown/Tan, Red/Tan, Orange/Tan, Yellow/Tan, Green/Tan, Blue/Tan,Purple/Tan, Gray/Tan, White/Tan, Black/Tan. Sequence is repeatedas necessary.






PitchTwisted Pair Centers: .100″ Nom.Conductor Centers in Flat: .050″ ± .005″

Pairs 1/2″ Nom. LayAdjacent Pairs have Opposite Direction Lay

Construction 18″ of Twisted Pairs2″ of Flat Section



UL Approval File #E12683, Style Dual Rated 2693 & 2697

CSA Approval Available Upon Request

Packaging H100



Current Rating 1A



Impedance (Balanced) 115Ω

Impedance* (Unbalanced) 100Ω



Propagation Delay* 1.60 ns/ft. (5.25 ns/m)*Test Configuration: G-S (ground-signal), unbalanced.

8

3 5 7


Cros

stal

k (%

) 6

4

2

0

Near end

Far end

9V280XX Series

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

20 30 40 50 60 70 809010010

20

6

4

3

5

789

10

15

9V280XX Series

.100″(2.54mm)

Section Thru TwistA

.080″(2.03mm)


PartNo.

No. of

PairsInch mm

Dimensions


Inch mm

B

.042″ ±.003″(1.07mm ±0.08mm)

.050″ ±.005″(1.27mm ±0.13mm).025″

(.64mm)

Tan(No. 1

Common)

Brown(No.1

Signal)

Section Thru Flat

Twist

FlatTermination

Area

18″ Nom.(457.20mm)

20″ ±.5″(508mm ±12.70mm)

2.0″ +.5″/-0(50.8mm +12.7/-0)

7•

Flat

Cab

le


Unbalanced Crosstalk* Attenuation*(See page 7.14 for Balanced Crosstalk)

NOTE: the transition area is included in the twisted section to assure a full 2 Inches of flat termination area.

Vari-Twist® 8V280XX Series.050″ Pitch, 28 AWG, FEP (High Temperature)


8V28010 5 .50 12.70 .45 ±.012 11.43 ±.318V28014 7 .70 17.78 .65 ±.012 16.51 ±.318V28020 10 1.00 25.40 .95 ±.015 24.13 ±.388V28026 13 1.30 33.02 1.25 ±.015 31.75 ±.388V28036 18 1.80 45.72 1.75 ±.017 44.45 ±.438V28040 20 2.00 50.80 1.95 ±.017 49.53 ±.438V28060 30 3.00 76.20 2.95 ±.020 74.93 ±.51

Dimensions

16

3 5 7


Cros

stal

k (%

)

Near end

Far end

8V280XX Series

12

8

4

0

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

20 30 40 50 60 7080 9010010

10

3.0

2.0

1.5

9.0

8V280XX Series

2.5

4.0

5.0

6.07.08.0

15

PartNo.

No. of

PairsInch mm

Dimensions


Inch mm

.100″(2.54mm)

Section Thru TwistA

.080″(2.03mm)

B

.042″ ±.003″(1.07mm ±0.08mm)

.050″ ±.005″(1.27mm ±0.13mm).025″

(.64mm)

Tan(No. 1

Common)

Brown(No.1

Signal)

Section Thru Flat

Twist

FlatTermination

Area

18″ Nom.(457.20mm)

20″ ±.5″(508mm ±12.70mm)

2.0″ +.5″/-0(50.8mm +12.7/-0)

Product Description

Belden’s FEP Vari-Twist 8V280XX series allows for high and lowtemperature, low out-gassing, and chemical resistant applications,improved electricals, and provides quick identification and circuittracing. The cable was designed to reduce crosstalk in the balanced mode by twisting the pairs but can be mass-terminated in the programmed flat sections with any standard IDC connector. To further reduce crosstalk, each adjacent pair is twisted in theopposite direction. The standard twist length is 18 inches followed by a 2 inch flat section of .050″ spaced conductors. The cable consists of stranded 28 AWG (7x36) silver-plated copper, color-coded FEP pre-insulated singles — laminated to a single clear FEPsubstrate. Eight various conductor/pair counts are standard; othersizes are available upon request. The cable is UL approved andpasses the IEEE 383-1974 70,000 BTU Flame Test.

Upon your request, Vari-Twist can also be manufactured to yourown specific requirements whether that be longer or shorter twistsections and/or flat sections.


Application: Internal wiring of appliances or electronic equipment.May be additionally marked “For 300V Peak Electronic Use Only.”


Conductor 28 AWG (7x36) Silver-plated Copper

Insulation .010″ Nom. Wall Color-coded FEP

Substrate .010″ Nom. Wall Clear FEP





Flammability Rating UL: VW-1; IEEE 383-197470,000 BTU


Packaging 100



Current Rating 1A





Capacitance* (@ 1 MHz) 10.6 pF/ft. (34.78 pF/m)


Propagation Delay* 1.32 ns/ft. (4.33 ns/m)*Test Configuration: G-S (ground-signal), unbalanced.




Shielded Jacketed 9L283XX Series.050″ Pitch, 28 AWG, PVC

9L28309 9 .55 13.97 .40 ±.008 10.16 ±.209L28310 10 .60 15.24 .45 ±.008 11.43 ±.209L28315 15 .85 21.59 .70 ±.008 17.78 ±.209L28320 20 1.10 27.94 .95 ±.008 24.13 ±.209L28325 25 1.35 34.29 1.20 ±.008 30.48 ±.209L28326 26 1.40 35.56 1.25 ±.008 31.75 ±.209L28334 34 1.80 45.72 1.65 ±.008 41.91 ±.209L28337 37 1.95 49.53 1.80 ±.012 45.72 ±.309L28340 40 2.10 53.34 1.95 ±.012 49.53 ±.309L28350 50 2.60 66.04 2.45 ±.012 62.23 ±.309L28360 60 3.10 78.74 2.95 ±.012 74.93 ±.30

Dimensions

Product Description

Belden’s shielded jacketed 9L283XX series was designed to helpmeet the FCC EMI/RFI requirements. In addition, the cable providesshielding from external electrical interference along with excellentcrosstalk attenuation. The thin extruded jacket allows for greaterflexibility, ease of termination, and reduced space requirements,while providing exterior protection from the environment. The corecable is Belden’s 9L280XX PVC series allowing easy termination toany standard IDC connector. All cables are 100% shielded with aDuofoil® shield (aluminum/polyester/aluminum) and can be terminatedwith the two 28 AWG drain wires. Thirteen various conductor countsare standard; other sizes are available upon request. The cable isUL approved and CSA certified, and passes the VW-1 Vertical WireFlame Test.

Color Code: Gray with Red polarity stripe.

Application: External interconnection or internal wiring of electronic equipment.




Pitch .050″ ± .002″

Shielding Duofoil Shield(Aluminum/Polyester/Aluminum)

Drain Wires Two 28 AWG (7x36) Tinned Copper

Jacket .038″ Nom. Wall Black PVC




CSA Approval File #LL7874, CSA AWM II A105°C 300V FT1

Packaging 100



Current Rating 1A



Impedance* 45Ω



Propagation Delay* 1.70 ns/ft. (5.6 ns/m)*Test Configuration: G-S-G (ground-signal-ground), with shield grounded.

8

7

6

5

4

3

2

1

03 5 7


Cros

stal

k (%

)

Near end

Far end

9L283XX Series

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

20 30 40 50 60 70 80 9010010

20

5

3

2

15

9L283XX Series

4

6789

10

25

Belden’s Standard9L280XX Ribbon Cable

.038″ Nom. BlackPVC Jacket

100% CoverageDuofoil® Shield(Aluminum/Polyester/Aluminum)

.122″ ±.012″

(2) 28 AWG (7 X 36)Tin-Plated CopperDrain Wire(s)Near Cable Edge

B

A


PartNo.

No. of

Cond.Inch mm

Dimensions


Inch mm

7•

Flat

Cab

le



Shielded Jacketed Vari-Twist® 9V283XX Series.050″ Pitch, 28 AWG, PVC


9V28310 5 .60 15.24 .45 ±.012 11.43 ±.309V28314 7 .80 20.32 .65 ±.012 16.51 ±.309V28326 13 1.40 35.56 1.25 ±.015 31.75 ±.389V28334 17 1.80 45.72 1.65 ±.015 41.91 ±.389V28350 25 2.60 66.04 2.45 ±.017 62.23 ±.43

Dimensions

Product Description

Belden’s shielded jacketed 9V283XX series was designed to help meet the FCC EMI/RFI requirements. In addition, the cableprovides shielding from external electrical interference along withexcellent crosstalk attenuation. As with the 9V280XX series, the cable supplies the electrical benefits of twisted pairs, but can be mass-terminated in the programmed flat sections. The thin extrudedjacket allows for greater flexibility, ease of termination, reducedspace requirements, and identification of the flat sections while providing exterior protection from the environment. The core cableis Belden’s 9V280XX PVC series to allow easy termination to anystandard IDC connector. All cables are 100% shielded with aDuofoil® shield (aluminum/polyester/aluminum) and can be terminatedwith the two 28 AWG drain wires. Ten various conductor/pair countsare standard; other sizes are available upon request. The cable is UL approved (CSA available upon request) and passes the VW-1Vertical Wire Flame Test.


Application: External interconnection or internal wiring of electronic equipment.








Shielding Duofoil Shield (Aluminum/Polyester/Aluminum)

Drain Wires Two 28 AWG (7x36) Tinned Copper

Jacket .038″ Nom. Wall Black PVC




CSA Approval Available Upon Request

Packaging 100



Current Rating 1A







Propagation Delay* 1.60 ns/ft. (5.25 ns/m)*Test Configuration: G-S-G (ground-signal-ground) with shield grounded.

8

3 5 7Pulse Rise Time (ns)

Cros

stal

k (%

)

9V283XX Series

6

4

2

0Far end

Near end

Frequency (MHz)

Atte

nuat

ion

(dB/

100

ft.)

20 30 40 50 60 70 80 9010010

20

6

4

3

5

789

10

15

9V283XX Series

Belden’s Standard9V280XX Vari-Twist® Cable

.038″ Nom. BlackPVC Jacket

100% CoverageDuofoil® Shield(Aluminum/Polyester/Aluminum)

.127″ ±.012″(Straight Section).147″ Nom.(Twisted Section)

(2) 28 AWG (7 X 36)Tin-Plated CopperDrain Wire(s)Near Cable EdgeB

A

PartNo.

No. of

PairsInch mm

Dimensions


Inch mm





7•

Flat

Cab

le


The following is a description of two methods Belden uses to test its flat cablefor crosstalk. Because these methods aredifferent, the results may be different evenwhen the same type of cable is used ineach test. In short, the reader is offered two different tests to determine which cabletype has the best crosstalk characteristics. At times, the results of these two test methods do not agree. Therefore, it is best for the reader to determine whichmethod most closely approximates actualcable application and use its results forcable comparisons.

Unbalanced Crosstalk

The unbalanced crosstalk of flat cables is measured as shown in Figure 1. One end of the cable drive is connected throughan impedance matching device to a signalgenerator. The other end of the drive line is terminated in its characteristicimpedance. The signal generator is capable of generating square wave pulses of varying leading edge rise times.

A test signal from the signal generator isinserted into the drive line. The cable isconnected as follows: Ground-Drive line-Ground-Sample line-Ground or GSG mode.The sample line is also terminated at bothends in its characteristic impedance. Thesignal at each end of the sample line ismeasured. The signal at the signal generatorend of the sample line is called the nearend or reverse crosstalk. The signal at theopposite end of the sample line is calledthe far end or forward crosstalk. The actualcrosstalk figures are given in % and arecalculated as follows:

% Crosstalk =Signal in sample line

x 100%Signal in drive line

This type of crosstalk test is widely accepted in the flat cable industry. It is a very good method to determine the pulse crosstalk of all types of flat cables connected in the GSG mode. Crosstalk data for Belden flat cables tested using this method is given in the electrical data section of each cable.

FIgure 1: Unbalanced Near End Crosstalk

Technical InformationFlat Cable Crosstalk Testing

SquareWave

Generator

Cable Terminations

Oscilloscope

Sample Signal

ImpedanceMatchingDevice

DriveSignal



Balanced Crosstalk

Twisted pair flat cables are not designed to be connected in the GSG mode. Thesecables provide positive crosstalk reductionover non-twisted pair cables when used inthe balanced mode. The balanced crosstalkof twisted pair flat cables is measured asshown in Figure 2. One end of the cabledrive pair is connected through a balancedimpedance matching transformer to thenetwork analyzer input. The other end ofthe cable drive pair is terminated in its characteristic impedance. One end of thesample pair is terminated in its characteristicimpedance. The other end of the cablesample pair is connected through a balanced impedance matching transformerto the network analyzer output. Because impedance matching transformers areused, none of the wires in the drive or sample line share a common ground. Thesignal in each line is balanced to ground.For example, one wire of the line will carrythe inverse of the signal in the other wire in the same line at any given moment. Thesignal from the tracking generator is arange of frequencies, typically from 10 MHzto 100 MHz. The signal at each end of thesample line is measured in units of dB ofisolation using a spectrum analyzer. Thecrosstalk results of two cables, one withparallel non-twisted conductors (9L Series)and the other with twisted pair conductors(9V Series) is shown in Figure 3.

In conclusion, it is not the intent of this section to recommend one type of crosstalktesting over another. Rather, it is intended to demonstrate there are different cabletypes for the different cable applications.

Please choose the crosstalk testing method which most closely approximatesyour application.

Figure 2: Balanced Near End Crosstalk

Figure 3: Balanced Crosstalk

Technical InformationFlat Cable Crosstalk Testing

10

20

30

40

50

60

7010 20 30 40 50 60 70 80 90 100

Frequency (MHz)

9L280XX Near end crosstalk

9L280XX Far end crosstalk

9V280XX Near end crosstalk

9V280XX Far end crosstalk

Cros

stal

k Is

olat

ion

dB

Drive Pair

SamplePair

Impedance MatchingTransformers

Output Input

NetworkAnalyzer

Documents

Plat Cable Belden